Squick: The US version, hints at romance between Arthur and Selenia, who is voiced by Madonna. The sequels remedy this by using Selena Gomez.
It's hinted in all versions, they even get married in the first movie... making it a gender flippedOld Man Marrying a Child... But this last part is somewhat subverted in that the years of the Minimoy calendar are much shorter, leading 1000 Minimoy Years to be equivalent to about ten years from the human perspective. It doesn't change the fact that she's far more mature than him biologically though.
What An Idiot: So they are gonna climb down, and Arthur takes the lace Selenia's top is held up with as Betameche says he has no rope. Which makes her cover herself. Later they have a rope from the very item he claimed that doesn't have a rope, so she never really had to embarrass herself. WHY DIDN'T THEY REALLY CHECK IF THEY HAD A ROPE FIRST?! Worse still, Arthur is the one pulling out the string, and later she falls for him, just enforcing All Girls Want Bad Boys.